Morphological and molecular characterisation of Longidorus juglans sp. nov. and a sister species L. fangi Xu & Cheng, 1991 (Nematoda: Longidoridae) from China-Reference-Cited by-同舟云学术

Morphological and molecular characterisation of Longidorus juglans sp. nov. and a sister species L. fangi Xu & Cheng, 1991 (Nematoda: Longidoridae) from China

Published:2017 Issue:8 Volume:19 Page:951-970
ISSN:1388-5545
Container-title:Nematology
language:
Short-container-title:Nematol

Author:

Xu Yumei¹,Guo Kai²³,Ye Weimin⁴,Wang Jianming¹,Zheng Jingwu³,Zhao Zengqi¹⁵

Affiliation:

1. Laboratory of Nematology, Department of Plant Pathology, Agronomy College, Shanxi Agricultural University, Taigu, 030801, P.R. China

2. State Key Laboratory of Subtropical Silviculture, Zhejiang Agricultural and Forestry University, Lin’an, Hangzhou 311300, P.R. China

3. Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, P.R. China

4. Nematode Assay Section, Agronomic Division, North Carolina Department of Agriculture and Consumer Services, Raleigh, NC 27607, USA

5. Landcare Research, Private Bag 92170, Auckland Mail Centre, Auckland 1142, New Zealand

Abstract

Longidorus juglanssp. nov. is a new needle nematode detected from the rhizosphere of a walnut tree in Shanxi Province, P.R. China. It was distinguished by female body length of 3.9-5.2 mm; lip region 14-18 μm wide, rounded and continuous, amphidial fovea pocket-shaped without distinct basal lobes; moderately long odontostyle (125-140 μm); guide ring at mid-odontostyle and situated 69-78 μm from anterior end; short and blunt conoid tail (30-41 μm long, c = 118-147, c′ = 0.6-0.9), bearing 2-3 caudal pores on each side. The male ofL. juglanssp. nov. is 5.1 mm long, with 13 ventro-median supplements, a short and blunt conoid tail bearing 3-4 caudal pores on each side, and spicules 73 μm long. Three developmental juvenile stages were recognised. This new species is very similar to another Chinese speciesL. fangiin general morphology, but can be distinguished by the number of juvenile stages and DNA sequences of SSU, ITS1, ITS2 and D2-D3 of LSU rDNA. Morphological and molecular characterisation was provided forL. fangirepresenting two new geographical records. The phylogenetic relationships among these species were analysed using data from SSU, D2-D3 of LSU, ITS1 and ITS2 rDNA, which revealed thatL. juglanssp. nov. andL. fangiwere clustered together withL. diadecturus,L. litchiiandL. jonesiwhose guide ring is located at mid-odontostyle level.

Publisher

Brill

Subject

Agronomy and Crop Science,Ecology, Evolution, Behavior and Systematics

Link

https://data.brill.com/files/journals/15685411_019_08_s007_text.pdf

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